相变点

Results showed that expansion coefficient exhibited anomalous behaviours, which at the -80℃ transition phase point temperature that are caused by Jahn Teller of "Ti—Ba—Ti—"on Barium Titanate, at same time, we also discussed that dielectric constant affected by the rate of vacancy on barium titanate.

结果表明在钛酸钡的三个相变温度点（120℃、8℃、－80℃）处，热膨胀系数反常变化，我们认为相变温度为－80℃处的热膨胀反常是因钛酸钡BaTiO3中对称元"Ti—Ba—Ti"的静态畸变造成。同时本文讨论了BaTiO3中空隙对其介电常数的影响。

In the thermodynamic limit, the zeros accumulate nearly the transition point z_0 in the real axis and the density of zeros near z_0 determines the order of the phase transition.

在热力学极限下，配分函数零点在正实轴上集聚的那些点z_0给出了相变的位置，同时在z_0附近的配分函数零点密度决定了相变的类型。

Effect of austenitizing temperature and air cooling rate on microstructure and properties of the CFB/M steel;2. Discussion on the feasibility and economy of 1000MW ultra-supercritical direct air cooling unit;3. Metal transformation temperature under air cooling condition was actually measured.

实测了空冷条件下金属的温度，分析了相变潜热释放引起的温降速度变化规律，并通过冷却速度曲线畸变特征点对实际工况下的金属相变开始温度和结束温度以及相变持续时间进行了判定。

DSC and dilatometry were carried out to determine the phase transformation temperature of a high speed steel used for centrifugal cast rolls.

采用差式扫描量热法及热膨胀法测定了离心铸造轧辊用高速钢的相变点，根据高速钢的临界转变温度，进行了退火、淬火和回火实验。

After 700~750℃ vacuum annealing, the equiaxed microstructure is obtained, which is uniform and thin, the strength and plastic are the best matching.

在相变点之上，获得锯齿状的粗大晶粒，强度较高，而塑性较差。

It is considered that when temperature begins to fall down under Ms, martensite and the untransformed mother-phase are in a kind of thermobalance. We try to use the equations in marten- site transform to get the mathematical relationship between the dynamics of the microclamp and the temperature, also including some useful results for design and fabrication of the microclamp. We hope these results will form the work principle base for SMA microclamp.

认为在Ms点以下，马氏体与未转变的母相奥氏体处於某种平衡状态，利用变温马氏体相变公式，处理SMA微夹钳的热力学和动力学之间的定量或定性的数学关系，得出一些对於设计和制造有用的结论，从而为深入研究SMA微夹钳的热弹性马氏体相变的工作原理打下理论基础。

After the phase inversion point,the dynamic rheological parameters increase greatly with adding water.

实验结果表明，体系在相反转点前表现为牛顿流体行为，粘度几乎不变﹔相反转点时，体系粘度增加幅度很小，体系的有关动态流变参数(剪切储能模量、损耗模量和复数粘度)均出现极小值，将此归于局部连续水相的润滑作用﹔进一步加水，体系的动态流变量增加，意味著相反转在相反转点后仍在继续进行。

On the basis of analyzing the thermodynamic properties and cycle performance of pure refrigerants, the paper optimizes their concentration while screening NARMs used in wide variable-temperature heat source. The practical applications of NARMs, such as R22/R123, R123/R125 etc., are studied in geothermal heat pump, seawater heat pump, air dehumidification system and dual-evaporator domestic refrigerator. The results show that the NARMs can match the limitation of a pinch point at the air-side exit of heat exchanger, reduce the unreasonable heat transfer temperature difference, and improve the COP of system. The above conclusion is proved by measuring the cycle performance of R12, MP39 and R11/R22 in a two-evaporator experimental system.

其次，本文在工质热物性和变工况循环性能分析基础上，筛选和优化了适应外部大变温热源约束条件的非共沸混合工质及其浓度配比；讨论了相变温差较大的非共沸混合工质（如R22/R123、R123/R125等）在地热源供热热泵、海水源供热热泵、双门冰箱和热泵空气除湿的应用，计算分析表明制冷与热泵系统采用相变温差较大的非共沸混合工质有利于弱化传热过程的&窄点&的约束，减小传热过程中的不合理温差，提高系统COP值；通过建立双蒸发温度循环系统试验装置，对R12、R22/R11和R22/R152a/R124循环性能进行实验研究，结果与理论分析一致。

The results show that mechanical properties and microstructure only relate to recrystallization below the transformation point.

结果表明，在相变点之下，合金力学性能、显微组织只与再结晶有关；经(700~750)℃×1hAC的真空退火，可获得均匀细小的等轴组织，强度、塑性达到最佳匹配。

We can estimate the quantum mobility according to the expression of SdH oscillations. At the transition point, the relation μB ~ 1 is still valid, which represents a necessity of well-separated Landau bands in the energy spectrum.

根据SdH震荡的数学式，我们可以估计二维电子的量子迁移率，并发现μB ~ 1的关系式在相变点依然成立，此显示能谱上不同蓝道能带间之可解析的必要性。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。